What kind of music do you like? Some of my favourite bands (that aren't too well-known) are..
Somato Sensory, Envy on the Coast, Cartel, Blessthefall, Kittie, McQueen, Mariana's Trench and Pencey Prep.

But Something Corporate, Aiden, You Me At Six, Go: Audio, Taking Back Sunday, Flyleaf and Billy Talent are also amazing. But a bit more well-known, I think.

Particularly.. Shake Tramp by Mariana's Trench, Propane Nightmares by Pendulum, MakeDamnSure by Taking Back Sunday, Black Dying Rose by Blessthefall, Violence by the Ocean by Somato Sensory, Temper Temper by Envy on the Coast and I'm So Sick by Flyleaf. :]

__________________